Zf 6-speed into 72 4-speed - CorvetteForum - Chevrolet Corvette Forum Discussion

C3 Tech/Performance
V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette

Zf 6-speed into 72 4-speed

Thread Tools Search this Thread
Old 01-20-2013, 05:48 PM   #1
Sleazy Rider
CF Senior Member
Thread Starter
Sleazy Rider's Avatar
Member Since: Sep 2004
Location: Conroe Texas
Posts: 3,463
Thanks: 0
Thanked 6 Times in 6 Posts
Default Zf 6-speed into 72 4-speed

I've seen threads on installing a T-56 into the C-3's but have not been able to find one for installing a ZF 6-speed out of a C4 Corvette into a C3 Corvette. Has this ever been done before, to anyones knowledge? If a T-56 will shoe horn into a C3, and the T-56 and the ZF are similar in size, and the ZF was the manual trans from 89 to 96, I would think someone did this conversion in the past. Parts is not an issue, I have 3 transmissions and 2 bellhousings to driveshafts for the conversion.
Sleazy Rider is offline   Reply With Quote
Old 01-20-2013, 07:54 PM   #2
CF Senior Member
CA-Legal-Vette's Avatar
Member Since: Jul 2004
Location: Scottsdale and Foster City AZ and CA
Posts: 7,608
Thanked 73 Times in 68 Posts

The only person that I've ever seen do this is TwinTurbo, who doesn't come to CF very often any more. As I recall the bell housing is different, which required modification, you needed a hydraulic clutch ( no big deal) but probably the biggest issue was that the shift lever was noticeably further back. Iirc, he moved the motor forward to mitigate this.

I also think that you'd have to significantly modify the tunnel on a C3. The ZF is a bit of a monster.
CA-Legal-Vette is offline   Reply With Quote
Old 01-22-2013, 09:40 PM   #3
Gale Banks 80'
CF Senior Member
Member Since: Nov 2008
Posts: 1,837
Thanks: 0
Thanked 25 Times in 25 Posts

The biggest issue with the ZF is the lack of aftermarket parts. It needs the Duel Mass stock style Clutch or the trans will rattle in newtral. But if You have all this stuff go for it. It will use a reverse pull Clutch stock but you may be able to use another Hyd pilot bearing if You wish. The stock ZF Bell housing will bolt right up. If You jump over to the C4 section there is probably a lot of info. Also go to ZF Doc.com for all kinds of info. Carolina Clutch is where to get a replacement, consider stage two as stock. My 96 GS with a B&M Ripper Shifter is the best shifting Trans I have ever driven.
Gale Banks 80' is offline   Reply With Quote
Old 01-22-2013, 10:07 PM   #4
CF Senior Member
qwank's Avatar
Member Since: Feb 2011
Location: Southern NH
Posts: 5,831
Thanked 8 Times in 8 Posts

I put a clutch/flywheel in my brother's '93. We had to replace the flywheel because it was smoked. We had to go with a single mass because the GM dual mass is long discontinued. Even if you find one if would be a ton of money. (I think Rock auto had one for $1200) anyways, the rattling noise in neutral was so terrible that my brother got rid of the car. It's sounds like a lower end knock with your foot on the clutch in neutral.
qwank is offline   Reply With Quote
Go Back   CorvetteForum - Chevrolet Corvette Forum Discussion >
Reload this Page
  • Zf 6-speed into 72 4-speed

    Related Topics
    Thread Thread Starter Forum Replies Last Post
    Flywheel for 2pc real seal to zf6 trans sp361t C4 Tech/Performance 8 09-06-2016 09:21 PM
    ZF 6speed input shaft appelen C4 ZR-1 Discussion 6 02-12-2012 02:41 PM
    Hows the ZF6 Compare to T56? armybyrd C4 General Discussion 7 03-22-2008 10:44 AM
    ZF 6 speed conversion Tom Urani C4 Tech/Performance 12 04-27-2007 10:09 PM
    '95 Auto trans to ZF 6-speed conversion h-d-ryder C4 General Discussion 5 04-22-2006 04:39 PM

    Thread Tools Search this Thread
    Search this Thread:

    Click for Advanced Search

    Posting Rules
    You may not post new threads
    You may not post replies
    You may not post attachments
    You may not edit your posts

    BB code is On
    Smilies are On
    [IMG] code is On
    HTML code is Off
    Trackbacks are Off
    Pingbacks are Off
    Refbacks are Off

    Forum Jump

    Sponsored Ads
    Vendor Directory

    All times are GMT -4. The time now is 10:08 PM.

    • Ask a Question
      Get answers from community experts
    Question Title:
    Your question will be posted in: